Well since beginning of this month,rating on my gigs is dropped rapidly for like 3k+ I tried to change names,taggs,add new pictures,add videos.Every bit of trick but it didn’t help.
I had a same “situation” before 10-15 days.
I was made some changes on GIGs, like you say, some tags, description, etc. And I start to promote GIGs trough Social Network, some groups, profiles, forums, blogs.
I think you must work on Fiverr like a full-time job (I mean all things, not only work on the project) if you want the best result.
I hope that you will growth faster in future!